Dimethylformamide → 3,7-Diaminodibenzothiophene-5,5-dioxide

Participants

Reaction Steps

A mixture of 10.0 g of 3,7-dinitrodibenzothiophene S,S-dioxide, 180 ml of dimethylformamide, 20 ml of glacial acetic acid and 1.0 g of 5% palladium on carbon was hydrogenated in a Parr apparatus until hydrogen uptake ceased. The mixture was then filtered through diatomaceous earth, the filtrate poured into 1 liter of ice water, the solid collected by filtration, washed with ethanol and ether and dried at 110° C., giving 7.86 g of the desired product as a solid mp 320°-330° C.(dec.).

Provenance & Evidence